code: def audio_file():
      return "tests/data/fixture.wav"
  
file_path: muda/tests/test_core.py
imports: import tempfile
  import os
  import six
  import numpy
  import jams
  import librosa
  import muda
  import pytest
label_desc: Use image node_id 2 for calling a global function with example usage: audio_file() and returns: str